Locomotive-boiler furnace.



y *n saains ramena* carica.

omnes n. moonmor, nvANsroN, ILLINOIS, ASSIeivoa, BY MESNE ASSIGNMENTS,

To amenacen Anon coMPANY, 4wenn.

To all wh-0m it may concern:

Be it known 'thatL CHARLES B. MOORE, a citizen of the United States, and' a resident of the city of Evanston, county of Cook, and State of Illinois, have invented certain new and useful Improvements in' Locomotive- Boiler Furnaces, of which the following is a specification.

My invention relates .to improvements in locomotive boiler furnaces and has special reference to refractory baiiies or arches for the iireboxes of locomotive boilers.,

A The general objects of my invention are "to provide an improved. refractory .arch

which may be easily and quickly installed in locomotive fireboxes; to provide an arch which shall be comparatively light in weight and of low cost; to provide an arch which shall be easy to 'repair and parts of which may be readily removed to a'ord easy access to the irebox sides and flue sheet; and to provide an arch which in a practical sense shall assist infemniingling, admixing and igniting the iirebox gases and other coml bustibles.

My invention consists in the several improvements, the various constructions, and the combinations and relations of parts hereinatter set forth and particularly pointed out in the appended claim; and will be .readily understood upon reference to the accompanying drawings.

In these drawings, which form a part of this specification, Figure l .is a plan sectional view of a locomotive irebox equipped with a refractoryl arch' illustrating one embodiment of my invention; Fig. 2 is a vertical, transverse sectional view of the irebox on the line 2 2 of Fig. l; Fig. 3 is a longitudinal central sectional view onI the line 3-3 of Fig. 1; Fig, 4 is a detail transverse sectional view on the line 4.--4 of Fig. 3.

My inventionis capable of embodiment in 'ai ches of various forms and diferent loca-tions in the vreboX of a locomotive.

A so-called front arch is an arch or arched body located in the iirebox and adapted to baille or deflect the irebox gases in their passage from the grate to the iues. It occu- 'pies an inclined position, its forward end .in

m' I build vmy arches of a-umbe' of indion New :einem A coaronerron or nana- LocoMorIvE-sornnn. Firemen.

vidual bricks of a size thatmay be handled easily and that may be passed through the fuel door. The individual arch bricks are formed to present a* number of gas defiect-k ing surfaces which aid greatly in intermingling the gases and deflect the more solid fuel particles back to the fuel bed.

The various structures illustratedv in the .drawings have the features abovel men tioned. A locomotiverebox as shownonsi'sts of a flue sheet 2, side sheets 3, 3, acrown sheet 4 and a rear vsheet 5. A grate 6 is'provided in the lower part ofthe rebox. Flues 7 lead forward from' the flue sheet. The

rear sheet is provided with a fuel door or opening 8. The rebox itself is positioned within the shell 9 of the locomotive boiler, and I employ therein two water circulating arch tubes 10, the same extending from the v Patented May 4, 1915. Application filed December 18, 1911. Serial No. 686,837.

between the tubes andr respective side sheets to permit the necessary repairing of the side sheet stay bolts. e

Ibuild my preferred form of arch of two brick patterns or forms a and b. The bricks c form the central or main portion of the arch, a plurality of pairs being used which rest upon and are arched between the tubes 10. These bricks abut midway between the tubes and are provided with complementary Y interlocking tongues 11 and grooves 12 upon their abutting ends. These interlocking tongues and grooves in combination with the end or locking bricks b `.maintain the bricks a in their proper positions once they have been placed. I The tongues and grooves prevent lthe relative vertical movement of the abutting ends and the locking bricks b prevent lateral separation of the bricks a. In addition to the above, the weight of the\bricks a assists in retaining them in interlocked condition and hence in their Aproperrelativeposition in the irebox. f

I prefer to make the bricks a practically as wide. as possible consistent with the .other requirements, to the end that the number of individual bricks Vor piecesixi the arch will be as few as possible, to facilitate the rapid construction of these. arches. The arch" ""v``i`ar"g`inal edgesl 5 inarginal v'ribs being joined. by the middle partition or wall as. This Wall divides the 2d gas` deflecting surface.

' forming a pair 'being 30, a, that is,

' theirends and the side sheets 3 of the fire"- The bricks' a and. b .abut above the l. tubes l10, 'so-that they each iind a restin .l place thereon and the outer ends oftheen l. 35 or locking bricks b aresupported upon studS ZboX.

Y alinement with N f studs 55 relieved a are provided with a plurality of gas mixing cavities or pockets a in their under i sides which not only lighten the bricks,` making it 4possible to form them of larger 5' area than if they were solid and yet not be too heavy for convenient handling, but also provides the arch with a plurality of gas defiecting surfaces or walls arranged at different angles which enhance the desired'eifect of intermingling the gases and .deflecting the fuel particles downward -to the fuel bed. These pockets .result in the bricks a being provided with comparatively narrow or thin or ribs a2, the longitudinal pockets a. into smaller pocketsand strengthens-'the longitudinal-mar 'nal edges a2 besides providing the brick with anV additional The'lengthof the bricks a is determnedby the spread 'of the tubes 10', the combinedlength of the bricks considerably more than the distance,` apart ofthe centers of the 25 tubes, Iso thatfwhen the'bricks are placed in rest against each other position they ,will after the/manner of'a gable roof and sustain eachother in position.

The bricks b extend in line with thebricks downwardly, and illl in between or lugs v provided uponthe side sheets beil low adjacent tubes l0. The 'bricks b are preferably of the same width and depth as `'the bricks `a and in a sense complete the par- Q0. tial arc-'hformed'by vthe bricks' a., Theyt are 1preferably lprovided with gas mixing pockets b in their under sides simlarito the pockets 'a' in thefbricks` a and which serve V `the same purpose.r

5" 3 Tor make the arch4` as a whole substantial c 'and 'retaln 1t' secureliy' in position,` the locking bricks b are preferably beveled on their outer ends to abut the side sheet with substantiallyvtheir whole area.. The bricks b 50`beingV inclined downwardly in substantial the span or archwbricks a,

" v'the weight of" the arch is mainly carried by Ithe'side sheets through the medium of the nd to this/extent the tubes 10 are of the thrust of the bricksv a mak-v t "ing'this form of construction very desirable v'j for ireboxes having vAnother desirable feature of t but two arch tubes.

is formlof construction is that the downwardly extending key or locking bricks b reduce the rebox space below lthe arch or below the tubes. This isparticularly advantageous in fireboxes that are comparatively-high or in those of ordinary height in which the arch tubes rise comparatively near vto the crown sheet.

ln building or installing arches which embody my invention, I lplace the lowermosty pair of spective side sheet studs 3,', and rproperly space' them from the flue. sheet by means of the refractory spacing bricks or blocks C, which are supported and: held in lace by the tubes 10. Then I complete the rst span by placing the first or lowermostpair or span of the bricks a in position, abutting the bricks b substantially above the tubes 10, upon which the bricks a rest and by which "they are supported and havin'gtheir abutting ends leaning against ,the ue sheet.

4Then I buildthe second span in like man' ner, placingthe'bricks thereof inposition uponthe tubes and resting against therespective. bricks v"of the first span- The open-l ings dfbetween the .lower front corners of the. arch and the flue sheet-serve to allow the cinders and ashes which collect upon the top or back of the arch, to return to the Having thus, described my invention, I

.claim as new' and ldesire to secure by Letters Patent:

,. A locomotive boller re b oX as described, lin combination .with two longitudinally inclined waterecirculating arch-tubes adjacent to opposite-side sheets of. thebox, studs upon said side sheets substantially below respective tubes, a row of downwardly and outwardly inclined refractory bricks -between each tube and adjacent side sheet, each said brick having its inner end upon thetube and its outer end supported by a said stud or studs, anfarch bodyformed of two longitudinal -rows of refractory bricks arched upon and between sald rows ofbricks and each of `thebody. bricks having' in its under side two gas mixing pockets se arated by a strengthenlng wall or partition..

, Intestimony whereof, I have hereunto 4 setmy hand ythis thday of December, 1911,

in the presence of two subscribing witnesses.

. l.CHARLES B. MOORE.

Witnesses: CHARLES Gunnar HAWLEY, EDWARD F; WrLsoN.

locking bricks b in position .resting upon the tubes 10 and upon the re, 70 

